construction challenges -- we issued our first ncp on the irvington tunnel project in july.what we're doing, because of the permitting issue that i talked about earlier, some of these permits are taking longer to secure. what we're doing is following an approach here where we are issuing --h we negotiated with the contractor to issue multiple ñrthe first allows the contacted to begin for chairman, some metals, and some field survey. we can then secure land and issue an additional for the f -- the first allows the contractor to begin procurements, submittals, and some field surveys. one challenge we are encountering on the bay division pipeline 5 project, we have encountered a high concentration of nickel in some of the soil we dug up for trenching activity, so that will be requiring special hazardous material handling and compliance with more stringent disposal requirements. also on that project, we have m site that will require us to tunnel under that site, which, ofrhvok course, is going to bee costly. we also have five other sites withó archaeological discoveries that co